Permeability Measurement Methods in Porous Media of Fiber Reinforced Composites

2010 ◽  
Vol 63 (2) ◽  
Author(s):  
Sanjay Sharma ◽  
Dennis A. Siginer
Keyword(s):  
Porous Media ◽  
Gas Flow ◽  
Experimental Methods ◽  
Fiber Reinforced Composites ◽  
Alternative Methods ◽  
Reinforced Composites ◽  
Flow Modeling ◽  
Fiber Reinforced ◽  
Permeability Measurement ◽  
Fluid Flow Modeling

Accurate measurement of permeability is critical for fluid flow modeling in porous media. Various experimental methods devised to measure permeability as a porous material property in composites are reviewed. Liquid flow and gas flow methods of permeability measurement for in-plane and transverse directions specifically for fiber-reinforced composites are discussed, as well as issues related to these methods and some associated permeability models. Alternative methods of permeability determination based on cross transport phenomenon are reviewed as well.

Permeability Measurement Methods in Porous Media: A Review

2008 ◽  
Author(s):  
Sanjay Sharma ◽  
Dennis A. Siginer
Keyword(s):  
Transport Phenomenon ◽  
Porous Media ◽  
Fluid Flow ◽  
Gas Flow ◽  
Experimental Methods ◽  
Measurement Methods ◽  
Alternative Methods ◽  
Flow Modeling ◽  
Permeability Measurement ◽  
Fluid Flow Modeling

Accurate measurement of Permeability is critical for fluid flow modeling in porous media. Various experimental methods have been devised that measure permeability as a porous material property. These experiments are based most commonly on Darcy’s law. Liquid flow and gas flow methods of permeability measurement for in-plane and transverse directions are detailed. Issues related to these methods are discussed. Some associated permeability models are discussed. Alternative methods of permeability determination based on cross transport phenomenon are presented.

scholarly journals Fracture Behavior of Nano Particle Reinforced Sisal Fiber Composites using Analytical and Experimental Methods

2019 ◽  
Vol 8 (10) ◽  
pp. 1724-1727
Keyword(s):  
Polymer Matrix ◽  
Fracture Behavior ◽  
Hybrid Composites ◽  
Experimental Methods ◽  
Fiber Composites ◽  
Fiber Reinforced Composites ◽  
Sisal Fiber ◽  
Carbon Powder ◽  
Reinforced Composites ◽  
Fiber Reinforced

Sisal fiber reinforced composites are being replaced with manmade composites as these materials are difficult to manufacture and non biodegradable. On the other hand, the natural fiber reinforced composites such as sisal fiber reinforced composites shows less strength compared to manmade composites. The objective of the present work is to explore the mechanical properties of sisal fiber composites and hybrid sisal composites using analytical and experimental methods. The sisal composites and hybrid sisal composites are prepared by using hand layup techniques. The hybrid composites are prepared by reinforcing nano carbon powder and sisal fibers in a polymer matrix with the weight fraction of 9% of carbon powder and 50% of sisal fiber. The elastic modulus of polymer matrix with carbon powder reinforcement and polymer matrix, carbon powder and sisal fiber reinforced composites are identified by conducting suitable experiments. Later by using the finite element method, the fracture behavior of sisal fiber composites and hybrid composites are estimated. The energy released (ER) and energy required to create the surface (ES) are estimated to identify the critical crack length of the respective material. The present work is used for the design of sisal fiber composites with respect to young’s modulus and fracture response.

scholarly journals Terahertz and Thermal Testing of Glass-Fiber Reinforced Composites with Impact Damages

2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
T. Chady ◽  
P. Lopato ◽  
B. Szymanik
Keyword(s):  
Harmonic Analysis ◽  
Glass Fiber ◽  
Experimental Methods ◽  
Fiber Reinforced Composites ◽  
Thermal Testing ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Active Thermography ◽  
Glass Fiber Reinforced ◽  
Impact Damages

The studies on glass-fiber reinforced composites, due to their growing popularity and high diversity of industrial applications, are becoming an increasingly popular branch of the nondestructive testing. Mentioned composites are used, among other applications, in wind turbine blades and are exposed to various kinds of damages. The equipment reliability requirements force the development of accurate methods of their health monitoring. In this paper we present the study of composite samples with impact damages, using three methods: terahertz time domain inspection, active thermography with convective excitation, and active thermography with microwave excitation. The results of discrete Fourier transform of obtained time sequences of signals will be presented as well as some image processing of resulting amplitude and phase images. Proposed experimental methods combined with harmonic analysis are efficient tool of defects detection and allowed to detect flaws in examined specimens. Reader may find it interesting that in spite of differences in nature of applied experimental methods, one technique of signal processing (harmonic analysis) gave adequate and comparable results in each case.

scholarly journals Critical Review of Fluid Flow Physics at Micro- to Nano‐scale Porous Media Applications in the Energy Sector

2018 ◽  
Vol 2018 ◽  
pp. 1-31 ◽  
Author(s):  
Harpreet Singh ◽  
Rho Shin Myong
Keyword(s):  
Porous Media ◽  
Fluid Flow ◽  
Liquid Flow ◽  
Gas Flow ◽  
Energy Sector ◽  
Hydrogen Gas ◽  
Flow Modeling ◽  
Shale Reservoirs ◽  
Media Applications ◽  
Fluid Flow Modeling

While there is a consensus in the literature that embracing nanodevices and nanomaterials helps in improving the efficiency and performance, the reason for the better performance is mostly subscribed to the nanosized material/structure of the system without sufficiently acknowledging the role of fluid flow mechanisms in these systems. This is evident from the literature review of fluid flow modeling in various energy-related applications, which reveals that the fundamental understanding of fluid transport at micro- and nanoscale is not adequately adapted in models. Incomplete or insufficient physics for the fluid flow can lead to untapped potential of these applications that can be used to increase their performance. This paper reviews the current state of research for the physics of gas and liquid flow at micro- and nanoscale and identified critical gaps to improve fluid flow modeling in four different applications related to the energy sector. The review for gas flow focuses on fundamentals of gas flow at rarefied conditions, the velocity slip, and temperature jump conditions. The review for liquid flow provides fundamental flow regimes of liquid flow, and liquid slip models as a function of key modeling parameters. The four porous media applications from energy sector considered in this review are (i) electrokinetic energy conversion devices, (ii) membrane-based water desalination through reverse osmosis, (iii) shale reservoirs, and (iv) hydrogen storage, respectively. Review of fluid flow modeling literature from these applications reveals that further improvements can be made by (i) modeling slip length as a function of key parameters, (ii) coupling the dependency of wettability and slip, (iii) using a reservoir-on-chip approach that can enable capturing the subcontinuum effects contributing to fluid flow in shale reservoirs, and (iv) including Knudsen diffusion and slip in the governing equations of hydrogen gas storage.

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